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Finding the Fourth Proportional to 235,644.72, 325,191.12 and 128,215.56

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Solution

The fourth proportional to 235,644.72, 325,191.12 and 128,215.56 is: 176,938.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,644.72 : 325,191.12 = 128,215.56 : x
  2. Step 2: Convert to fraction form
    235,644.72/325,191.12 = 128,215.56/x
  3. Step 3: Cross multiply
    235,644.72x = 325,191.12 × 128,215.56
  4. Step 4: Simplify right side
    235,644.72x = 41,694,561,557.83
  5. Step 5: Solve for x
    x = 41,694,561,557.83/235,644.72
  6. Step 6: Final answer
    x = 176,938.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.